US PATENT SUBCLASS 379 / 171
.~ Having plural stations with selective calling (e.g., master)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

167  DF  PRIVATE (E.G., HOUSE OR INTERCOM) OR SINGLE LINE SYSTEM {6}
171.~ Having plural stations with selective calling (e.g., master) {1}
172  DF  .~.~> With call addressing

DEFINITION

Classification: 379/171

Having plural stations with selective calling (e.g., master):

(under subclass 167) Subject matter having three or more station at least two of which have provision to direct a call to any other station.